6444154321 has 16 divisors (see below), whose sum is σ = 7227275328. Its totient is φ = 5694235200.

The previous prime is 6444154273. The next prime is 6444154373. The reversal of 6444154321 is 1234514446.

It is a cyclic number.

It is not a de Polignac number, because 6444154321 - 2¹³ = 6444146129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6444154121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 424366 + ... + 439288.

It is an arithmetic number, because the mean of its divisors is an integer number (451704708).

Almost surely, 2^6444154321 is an apocalyptic number.

It is an amenable number.

6444154321 is a deficient number, since it is larger than the sum of its proper divisors (783121007).

6444154321 is a wasteful number, since it uses less digits than its factorization.

6444154321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16032.

The product of its digits is 46080, while the sum is 34.

The square root of 6444154321 is about 80275.4901635611. The cubic root of 6444154321 is about 1860.8954644008.

Adding to 6444154321 its reverse (1234514446), we get a palindrome (7678668767).

The spelling of 6444154321 in words is "six billion, four hundred forty-four million, one hundred fifty-four thousand, three hundred twenty-one".